001 No person shall operate a diesel-powered motor vehicle on any public street or highway in such a manner that smoke discharged from the exhaust is of a shade or density equal to or darker than that designated as No. 1 on the Ringelmann Chart or an equivalent opacity of twenty percent (20%) for ten (10) consecutive seconds or longer. A suspected violator may demand that the suspected vehicle be tested by an approved smokemeter prior to a trial on the alleged violation.

002 Smokemeter tests shall be conducted (a) by or under the supervision of a person or testing facility authorized by the Director to conduct such tests, and (b) by installing an approved smokemeter on the exhaust pipe and operating the suspected vehicle in a manner similar to the manner of operation at the time of the alleged violation.